Archived posting to the Leica Users Group, 2005/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hello Mikiro, try auto colour correction on the dragonfly picture and see if it shifts to blue, it did when I ran it in PS Elements 3.0. I agree about the quality, I think it resembles more the shots from the Olympus P&S digicamera my wife uses more than what I'm used to getting from a Canon 20D or 300D. Are the images losing something during transfer from the linked site? I've just compared a few parameters between 20D and DMR files DNG file size 19.4MB converts to TIFF 28.7 MB CR2 file size 8.4MB converts to TIFF 23.4 MB Unless my way of thinking is terribly wrong I make that a compression factor of 1.48 for DNG and 2.8 for CR2, so you would be getting a lot more CR2 files on your storage card. The relative sizes are, at 240 dpi DMR 3876x2584 Canon 20D 3504x2336 pixels DMR 41.02x27.35cm Canon 20D 37.08x24.72cm print size at 240dpi Both files do have an aspect ratio of 1,5 (2:3 format) so nothing has been cropped here. The Leica file is in effect 1.2 times larger than the Canon file, so somebody is being not quite accurate with the factors 1,37 and 1,6 quoted for the crop factors, this should work out as 1.16 So in non-mathematical language the full resolution print size advantage you get with a Leica DMR file is 20%, sounds quite reasonable until you see that the print is then only 3.9cm longer (1.55 inches) and 2.6cm higher (1.03inches) at the same resolution of 240dpi. Probably all a waste of time , but somebody may find the figures interesting. Cheers Douglas MIKIRO wrote: > Douglas, > > I played with the image files on Photoshop. To my eye they look as if > they had been taken with a smaller digicam, which may suggest the > limited dynamic range you feel and/or possible problems of the lenses > used. I do not see a massive shift to the blue channel but a tone > similar to those I saw with Panasonic/Leica digicams. > > Cheers, > > MIKIRO > Japan > > Douglas Sharp wrote: > >> I downloaded the church and the dragonfly <nd ran them through PS with >> acouple of simple standard processes, levels. contrast, auto colour >> correction. Also through a couple of plug-ins like ColorCastFX. >> The reaction of the dragonfly shot to processing is disturbing, I get >> the impression that there is a very limited dynamic range on these >> files, and a tendency to a massive shift to the blue channel. >> Can anyone else confirm this so that I can be sure that it's not me >> making mistakes. >> Douglas >> >> B. D. Colen wrote: >> >>> And a 100 iso image at that. >>> >>> >>> On 6/2/05 7:20 PM, "eric" <leica_korenman@hotmail.com> wrote: >>> >>> >>>> Interesting - the color fringing problem is pretty darn severe on some >>>> images. >>>> Look at "Kapuzinerkirche Salzburg" and look at the light fixture on the >>>> upper left. >>>> Very prominent color fringing is evident. >>>> >>>> Eric >>>> >>>>> >>>>> ----- Original Message ----- >>>>> From: "Douglas Herr" <telyt@earthlink.net> >>>>> To: <lug@leica-users.org>; <leica@freelists.org>; >>>>> <leicareflex@freelists.org> >>>>> Sent: Thursday, June 02, 2005 6:06 PM >>>>> Subject: [Leica] DMR RAW files for download >>>>> >>>>> >>>>> >>>>>> Several sample RAW files in DNG format are available on Peter >>>>>> Werner's >>>>>> website (not dial-up friendly): >>>>>> >>>>>> http://www.leicaphoto.net/Download/DMR_Raw/index.html >>>>>> >>>>>> >>>>>> Doug Herr >>>>>> Birdman of Sacramento >>>>>> http://www.wildlightphoto.com > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >